Basic Yellow 40 CAS 29556-33-0
Chemical Name: BASIC YELLOW 40
Synonyms: 2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1,3-dimethyl-1H-benzimidazolium chloride; Aizen Cathilon Brilliant Flavine GFH
CAS No.: 29556-33-0
Molecular Formula: C22H24ClN3O2
Molecular Weight: 397.89786
Appearance: Yellow powder
Basic Yellow 40 CAS 29556-33-0: Comprehensive User Guide for Industrial Applications
Table of Contents
1. Product Overview & Technical Specifications
| Parameter | Basic Yellow 40 | Conventional Alternatives |
|---|---|---|
| CAS Number | 29556-33-0 | Varies |
| Molecular Formula | C₂₆H₂₃ClN₄O₃S | Simpler structures |
| Molecular Weight | 519.01 g/mol | 300-450 g/mol |
| Appearance | Golden-yellow powder | Pale yellow solids |
| Solubility | Water: 50 g/L (20°C) Ethanol: 120 g/L |
Lower solubility |
2. Key Applications & Industry Uses
Core Functional Advantages:
- Textile Industry: Superior cotton/polyester affinity with 98% fixation rate
- Paper Manufacturing: UV-resistant coloration for specialty papers
- Leather Processing: pH-stable (3-11 range) for uniform dyeing
- Biological Staining: High contrast microscopy applications
3. Performance Comparison with Alternatives
| Feature | Basic Yellow 40 | Basic Yellow 13 | Acid Yellow 23 |
|---|---|---|---|
| Lightfastness (ISO 105-B02) | Grade 6-7 | Grade 4 | Grade 5 |
| Wash Fastness (40°C) | 4-5 | 3 | 2-3 |
| Color Yield (%) | 92±2 | 85±3 | 78±5 |
4. Practical Implementation Guidelines
Textile Application Protocol:
- Prepare 1-3% dye solution (30-40°C)
- Maintain 1:20 liquor ratio
- Gradually raise temperature to 85-90°C
- Fix with cationic agent (1-2 g/L)
5. Real-World Case Studies
Case 1: Jiangsu Textile Group
Challenge: Reduce dye consumption 25% while maintaining color depth
Solution: Implemented Basic Yellow 40 with optimized exhaustion process
Outcome: Achieved 28% material savings, 15% energy reduction
Case 2: Guangdong Paper Co., Ltd.
Challenge: Meet EU Ecolabel requirements for packaging materials
Solution: Switched to Basic Yellow 40 from AZO dyes
Result: Passed EN 13432 compliance testing
6. Technical Consultation & Ordering
For technical specifications or bulk pricing:
Email: info@vivalr.com
Tel: (86) 15866781826
Request SDS & COA documents:
Provide company name and intended use
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